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- Silphium integrifolium var. integrifolium (category Silphium integrifolium)Ecliptinae genusSilphium speciesSilphium integrifolium varietySilphium integrifolium var. integrifolium Jennifer A. Clevinger Endemic Synonyms: Silphium integrifolium3 KB (150 words) - 20:10, 5 November 2020